adding X509CertPairParser fuzz test for [bc-java] (#8274)

projects/bc-java/X509CertPairParserFuzzer.java

@@ -0,0 +1,36 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+////////////////////////////////////////////////////////////////////////////////
+
+import com.code_intelligence.jazzer.api.FuzzedDataProvider;
+import java.io.IOException;
+import org.bouncycastle.x509.util.StreamParsingException;
+import org.bouncycastle.jce.provider.X509CertPairParser;
+import java.io.ByteArrayInputStream;
+
+public class X509CertPairParserFuzzer {
+  public static void fuzzerTestOneInput(FuzzedDataProvider data) {
+    X509CertPairParser xcpp = new X509CertPairParser();
+    xcpp.engineInit(new ByteArrayInputStream(data.consumeRemainingAsBytes()));
+
+    try{
+      xcpp.engineRead();
+    }
+    catch (StreamParsingException e){
+      return;
+    }
+
+  }
+}